<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<%@ page import="java.awt.*,java.awt.image.*,java.util.*,javax.imageio.*" %>
<%@ page import="java.io.OutputStream" %>
<%!
Color getRandColor(int fc,int bc){
	Random random = new Random();
	if(fc>255) fc=255;
	if(bc>255) bc=255;
	int r=fc+random.nextInt(bc-fc);
	int g=fc+random.nextInt(bc-fc);
	int b=fc+random.nextInt(bc-fc);
	return new Color(r,g,b);
}
%>
<%
try{
	response.setHeader("Pragma","No-cache");
	response.setHeader("Cache-Control","no-cache");
	response.setDateHeader("Expires", 0);
	int width=60, height=20;
	BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
	OutputStream os=response.getOutputStream();
	Graphics g = image.getGraphics();
	Random random = new Random();
	g.setColor(getRandColor(200,250));
	g.fillRect(0, 0, width, height);
	
	g.setFont(new Font("Times New Roman",Font.PLAIN,18));
	g.setColor(getRandColor(160,200));
	for (int i=0;i<155;i++)
	{
		int x = random.nextInt(width);
		int y = random.nextInt(height);
		int xl = random.nextInt(12);
		int yl = random.nextInt(12);
		g.drawLine(x,y,x+xl,y+yl);
	}
	String sRand="";
	for (int i=0;i<4;i++){
		String rand=String.valueOf(random.nextInt(10));
		sRand+=rand;
		g.setColor(new Color(20+random.nextInt(110),20+random.nextInt(110),20+random.nextInt(110)));
		g.drawString(rand,13*i+6,16);
	}
	
	session.setAttribute("rand",sRand);
	
	g.dispose();
	
	ImageIO.write(image, "JPEG",os);
	os.flush();
	os.close();
	os=null;
	response.flushBuffer();
	out.clear();
	out = pageContext.pushBody();
}catch(IllegalStateException e){
	System.out.println(e.getMessage());
	e.printStackTrace();
}%>